JPH10224374A - Cd-rom server system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the system to cope with an increased data amount without replacing a CD-ROM drive or a CD-ROM disk even when the data amount processed by the system is increased. SOLUTION: The CD-ROM server system connecting to a network is provided with a read/write storage device that is connected to a CD-ROM server 1 via a SCSI switch box 7 with a SCSI interface line and with a personal computer 5 that has a data write means writing data to the read/write storage device in the CD-ROM format. Then in the case of writing data to the read/write storage device, the SCSI switch box 7 is switched so that the read/write storage device is connected to the personal computer 5 and disconnected from the D-ROM server.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD-R for distributing data stored in a CD-ROM onto a network.
It relates to an OM server system.

[0002]

2. Description of the Related Art Conventionally, the only storage device that can be connected to a CD-ROM server system is a CD-ROM drive.

FIG. 4 is a block diagram showing an example of the system configuration of a conventional CD-ROM server system. In the figure, 1 is a CD-ROM server, 2 and 3
Indicates a CD-ROM drive, SCSI indicates a SCSI interface line, and LAN indicates a network line.

As shown in FIG. 4, a conventional CD-RO
The M server system includes a CD-ROM server 1 and a CD-ROM server.
ROM drives 2 and 3 are provided. FIG. 4 shows a case where two CD-ROM drives 2 and 3 are connected. The CD-ROM server 1 includes a network connection connector and a SCSI interface connection connector, and the CD-ROM drives 2 and 3 each include a SCSI interface connection connector. Then, the CD-ROM server 1 has, on the one hand, a network line LAN and, on the other hand,
It is connected to the SCSI interface line SCSI. The CD-ROM drives 2 and 3 are connected to the CD-ROM server 1 via a SCSI interface line SCSI.

A conventional CD-ROM server system has a C
The D-ROM server 1 is configured to read data stored in the CD-ROM drives 2 and 3 and distribute the read data via a network LAN. However, when the amount of data handled by the system increases, a CD-ROM drive must be added or a CD-RO drive must be added.
If the M disks are not replaced frequently, it cannot be handled. However, in this conventional system, S
Due to the limitations of the CSI standard, CD-ROM drives
Only 7 units can be connected at the maximum.

[0006]

As described in the prior art, a CD-ROM server system uses a CD-ROM.
Since a maximum of seven drives can be connected, when the amount of data handled by the system increases, the CD-ROM disk must be frequently replaced. According to the present invention, even if the amount of data handled by the system increases, the CD-ROM
It is an object of the present invention to be able to cope without replacing a drive or a CD-ROM disk.
To claim 3).

[0007]

According to the first aspect of the present invention, a CD-ROM server connected to a network and a CD-ROM server are provided.
In a CD-ROM server system comprising a ROM server and a CD-ROM drive connected to the ROM interface via a SCSI interface line, a read / write storage device connected to the CD-ROM server via the SCSI switch box via the SCSI interface line, and a read / write device A personal computer having means for writing data in a CD-ROM format to a read / write storage device, and connected to the personal computer side when writing to the read / write storage device;
The SCSI switch box is switched so as to be cut off from the ROM server side.

According to the invention of claim 2, the CD-ROM server connected to the network and the CD-ROM server
CD-ROM connected by CSI interface line
A CD-ROM server system comprising a drive, a SCSI switch box connected to the CD-ROM server via a SCSI interface line,
Two read / write storage devices connected by a switch box and a SCSI interface line, and a personal computer having means for writing data to the read / write storage device in a CD-ROM format are provided. When writing to one of the read / write storage devices, the SCSI switch box is connected to the personal computer and the other read / write storage device is connected to the CD-ROM server. I'm trying to switch.

According to a third aspect of the present invention, there is provided the CD-R of the second aspect.
In the OM server system, after writing data from a personal computer to one of the two read / write storage devices in a CD-ROM format, the SCSI switch box is switched and the same data as the written data is transferred to the other. Is written in a CD-ROM format to the read / write storage device.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a CD-ROM server system of the present invention will be described in detail with reference to the drawings. In the CD-ROM server system according to the present invention, the rewritable read / write storage device is connected to the CD-ROM server, so that the CD-R
Even if the amount of data handled on the OM server system increases or the number of data updates increases, it is possible to sufficiently cope with the situation. For this purpose, a large-capacity read / write storage device such as a hard disk drive is used, and its format is set to the same format as a CD-ROM disk. The format of the hard disk drive is FAT in ISO2660 format.

Specifically, the capacity of a CD-ROM disk is, for example, 650 MB, and one sector is 2,04 MB.
In contrast to 8 bytes / sector, the capacity of the hard disk is, for example, 2 GB, one sector of which is 512 bytes / sector. Therefore, 4 of the hard disk
One sector corresponds to one sector of the CD-ROM disk. Therefore, the firmware of the hard disk drive is changed, and its format is set so that a response similar to that of a CD-ROM disk can be made to an access from a CD-ROM server. With this configuration, it is possible to connect the hard disk drive as a read / write storage device to a SCSI interface line to which a CD-ROM server is connected. As a read / write storage device used in this case, in addition to a hard disk drive, an MO (magneto-optical disk), a PD (optical disk),
A DVD (digital video disk) or the like can also be connected.

First Embodiment A CD-ROM server system according to the present invention has a CD-RO
Along with the M drive, as a read / write storage device, a hard disk drive, MO (magneto-optical disk) drive, PD (optical disk) drive, DVD
(Digital video disk) Drive etc., CD-RO
It is characterized in that it can respond to an increase or change of data by connecting as a virtual CD-ROM drive in the same format as M, so to speak.

FIG. 1 is a block diagram showing an example of a system configuration according to the first embodiment of the CD-ROM server system of the present invention. The reference numerals in the figure are the same as those in FIG.
D), 5 is a personal computer (PC), 6 is a PC
A storage device 7 is a SCSI switch box.

As shown in FIG. 1, the CD-ROM of the present invention
In the ROM server system, a hard disk drive (HDD) 4 and a personal computer (PC) 5 are connected to each other via a SCSI interface line SCSI.
Connect to D-ROM server 1. The personal computer 5 is provided with a PC storage device 6. In this case, only one host can be connected to one SCSI interface line, and the CD-ROM server 1
If there are a plurality of hosts such as the personal computer 5 and the like, access to the hard disk drive 4 and the like will be confused, so the SCSI switch box 7 is added. The write data is stored in the PC storage device 6. Further, the personal computer 5 can write data at any time in a state where the PC storage device 6 is disconnected from the SCSI interface line SCSI. And the personal computer 5
When writing data in the PC storage device 6 to the HD of the hard disk drive 4, the SCSI switch box 7 is switched to the personal computer 5 side. This S
The switching control of the CSI switch box 7 is performed by the personal computer 5.

In the state of connection with the personal computer 5, the personal computer 5 changes the format of the HD (hard disk) of the hard disk drive 4 to the same format (physically, the CD-ROM of the CD-ROM drives 2 and 3). Is set to the Yellow Book standard (logically, ISO 9660 standard). After that, PC
Data on the hard disk drive 4 formatted in a CD-ROM format.
Write to. When the writing to the HD of the hard disk drive 4 is completed, the personal computer 5
The CSI switch box 7 is switched to the CD-ROM server 1 side. Therefore, in this state, the hard disk drive 4 can be accessed from the CD-ROM server 1. Thus, the rewritable read /
The hard disk drive 4, which is a writing storage device,
By connecting to the CD-ROM server 1, a CD-ROM
Increase in the amount of data processed on the ROM server system,
It is possible to cope with data update and the like. Instead of the hard disk drive 4, an MO drive, P
It is also possible to use a D drive, a DVD drive, or the like.

Second Embodiment The second embodiment mainly corresponds to the invention of claim 2, but also relates to the invention of claim 3. In the second embodiment, two hard disk drives are used, and one is a virtual C drive in a CD-ROM server system.
It is characterized in that it is connected as a D-ROM drive and the other is connected for writing data from a personal computer.

FIG. 2 is a block diagram showing an example of a system configuration according to the second embodiment of the CD-ROM server system of the present invention. The reference numerals in the figure are the same as those in FIG. 1, and 8 is a SCSI switch box.
And b indicate switch terminals, and 9 indicates a second hard disk drive (HDD2).

The SCSI switch box 8 is a hard switch and functions to alternately switch the hard disk drive 4 and the second hard disk drive 9 between two states. The first state is, for example, the switch state (terminal a- of the SCSI switch box 8) shown in FIG.
a, bb), in this first state, the personal computer 5 formats one of the hard disk drives 4 into a CD-ROM format, and This CD-
The data is written to the hard disk drive 4 previously formatted in the ROM format. Further, the CD-ROM server 1 reads out data already written in the other second hard disk drive 9 as data in the CD-ROM format from the second hard disk drive 9.

Next, in the second state, the SCSI switch box 8 is switched, and the terminals ab and ba of the SCSI switch box 8 are connected. This second
In the state (1), the personal computer 5 formats the second hard disk drive 9 into a CD-ROM format and transfers the data on the PC storage device 6 to the C-ROM.
The data is written to the second hard disk drive 9 formatted in the D-ROM format. Also, CD-RO
In the first state, the M server 1 also performs a CD-ROM
The data written in the format is read from the hard disk drive 4. The first state and the second state are obtained alternately by sequentially repeating such switching operations of the switches, so that the data in the PC storage device 6 is continuously read and the CD-ROM format is read. The two read / write storage devices, ie, the hard disk drive 4 and the second
Can be alternately written to the hard disk drive 9. In this case, since the hard disk drive 4 and the second hard disk drive 9 alternately perform a read operation and a write operation, the CD-ROM server 1 can always read data from one of the hard disk drives.

Third Embodiment The third embodiment mainly corresponds to the invention of claim 3, but also relates to the invention of claim 2. In the second embodiment, two hard disk drives are used, and one is a virtual C drive in a CD-ROM server system.
The case where the connection is made as a D-ROM drive and the other is connected for writing data from a personal computer has been described. The third embodiment is similar to the second embodiment.
Is an improvement of the CD-ROM server system described in the embodiment, in which the same data is written to two read / write storage devices so that important data is not lost by backing up each other. It has features. Therefore, the hardware configuration is the same as that of FIG.
And the basic operation is also common.

FIG. 3 is a flow chart showing a main processing flow at the time of data writing according to the third embodiment in the CD-ROM server system of the present invention.
In the figure, # 1 to # 5 indicate steps.

In step # 1, data is written to one of the hard disk drives (for example, HDD) in a CD-ROM format. In step # 2, it is checked whether the switch has been switched. When the switch is switched, in step # 3, the other hard disk drive (for example, HDD2) is connected to the other hard disk drive (for example, H2) before the switch is switched.
The same data as the data written in DD) is similarly continuously written in CD-ROM format data. In step # 4, it is checked whether the switch has been switched. If the switch has not been switched, the process proceeds to step # 5, and the flow proceeds to another processing flow. Also, as a result of the determination made in the previous step # 2, when the switch has not been switched, the process similarly proceeds to step 5 and shifts to another processing flow. On the other hand, if the result of determination in step # 4 above is that the switch has been switched, the process returns to step # 1 and performs the same processing. As described above, in the third embodiment, after writing data from the personal computer to one of the two read / write storage devices in the CD-ROM format, the SCSI switch box is switched. The same data as the written data is written to the other read / write storage device in a CD-ROM format.

[0023]

According to the CD-ROM server system of the first aspect, a personal computer connected to the CD-ROM server via a SCSI interface line can be used for
It is configured such that data can be written in a CD-ROM format to a read / write storage device connected to a CD-ROM server via a SCSI interface line. Therefore, the CD-ROM server can read the data on the read / write storage device as data on the CD-ROM disk.

In the CD-ROM server system according to the second aspect, two read / write storage devices are stored in a CD-RO server by a SCSI switch box connected to the CD-ROM server by a SCSI interface line.
The function is shared between the read-only device for the M server and the write-only device for the personal computer, and the state of these dedicated devices can be alternately switched between the two read / write storage devices. Therefore, the reading operation from the CD-ROM server and the writing operation from the personal computer can be performed efficiently and safely.

According to a third aspect of the present invention, in the CD-ROM server system according to the second aspect,
The configuration is such that the same data can be written to two read / write storage devices connected to the SCSI switch box. Therefore, the CD- of claim 2
In addition to the effect of the ROM server system, the two read / write storage devices can always have a mutual backup function, thereby improving the reliability of the system.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a system configuration according to a first embodiment of a CD-ROM server system of the present invention.

FIG. 2 is a block diagram showing an example of a system configuration according to a second embodiment of the CD-ROM server system of the present invention.

FIG. 3 is a flowchart showing a flow of main processing at the time of data writing according to a third embodiment of the CD-ROM server system of the present invention.

FIG. 4 shows a conventional CD-ROM server system.
It is a block diagram showing an example of the system configuration.

[Explanation of symbols]

1 CD-ROM server, 2 and 3 CD-ROM drive, 4 hard disk drive (HDD), 5 personal computer (PC), 6 storage device for PC, 7
SCSI switch box, 8 SCSI switch box, 9 second hard disk drive

Claims (3)

[Claims] 1. A CD-ROM connected to a network
In a CD-ROM server system including a server and a CD-ROM drive connected to the CD-ROM server via a SCSI interface line, a readout connected to the CD-ROM server via a SCSI switch box via a SCSI interface line Read / write storage device and a CD-ROM for the read / write storage device
A personal computer having means for writing data in a format, and when writing to the read / write storage device,
Connected to the personal computer side and the CD-RO
The SCSI switch box is switched so as to be cut off from the M server side.
M server system. 2. A CD-ROM connected to a network
A CD-ROM server system comprising a server and a CD-ROM drive connected to the CD-ROM server via a SCSI interface line; a SCSI switch box connected to the CD-ROM server via a SCSI interface line; Two read / write storage devices connected to a switch box and a SCSI interface line, and a CD-ROM for the read / write storage device
And a personal computer having means for writing data in a format. When writing to one of the two read / write storage devices, the read / write storage device is connected to the personal computer side and the other read / write device is connected to the personal computer. A CD-ROM server system, wherein the SCSI switch box is switched so that a writing storage device is connected to the CD-ROM server side. 3. The CD-ROM server system according to claim 2, wherein after writing data in a CD-ROM format from a personal computer to one of the two read / write storage devices, the SCSI switch box is operated. A CD-ROM server system for switching and writing the same data as the written data to the other read / write storage device in a CD-ROM format.